Corrections GI 3 Flashcards
What 2 investigations are contraindicated in ulcerative colitis in the acute setting?
1) colonscopy
2) barium enema
due to risk of bowel perforation
What barium enema findings would you expect to see in ulcerative colitis?
- lead-piping inflammation (2ary to loss of haustral markings)
- thumb-printing (a marker of bowel wall inflammation)
- pseudopolyps (due to areas of ulcerating mucosa adjacent to areas of regenerating mucosa)
Cause of pseudopolyps in UC?
Due to areas of ulcerating mucosa adjacent to areas of regenerating mucosa.
Cause of lead-pipe appearance on barium enema in UC?
2ary to loss of haustral markings
What is the first line medical treatment to maintain remission in Crohns?
Azathioprine or mercaptopurine
What neurological complications can be seen in coeliac disease? (3)
1) Loss of balance: ataxia, loss of coordination, falls
2) Sensory symptoms: numbness in glove and stocking distribution
3) Headaches
Cause of loss of balance in coeliac?
Gluten ataxia
Cause of sensory symptoms in coeliac?
Gluten neuropathy
Cause of headaches in coeliac?
Gluten encephalopathy
Management of gastroparesis (3)?
1) Diet e.g. low fibre, smaller/more frequent meals
2) 1st line: domperidone (dopamine receptor antagonist)
3) 2nd line: metoclopramide or erythromycin (motility agents)
What are the management options in a peri-anal abscess?
IV Abx, examination under anaesthetic with incision and drainage
What are the extra-intestinal signs of Crohn’s disease?
1) Erythema nodosum
2) Arthritis
3) Gallstones
4) Renal stones
5) Ocular: anterior uveitis & episcleritis
Which type of inflammatory bowel disease are non-caseating granulomas seen in?
Crohn’s
What is the initial medical management of a severe flare of ulcerative colitis?
Admit to hospital for IV steroids and rehydration
What is the cause of Gilbert syndrome?
Reduced activity of UDP glucuronosyltransferase (the hepatic enzyme responsible for conjugation of bilirubin) resulting in indirect hyperbilirubinemia.
Which alternative serological test can be performed if IgA anti-TTG is weakly positive in coeliac disease?
Anti EMA
hat is the inheritance pattern of haemochromatosis? (1)
What gene is affected? (1)
Autosomal recessive
Human haemachromatosis protein (HFE) gene
What medication is used for diarrhoea symptoms in irritable bowel syndrome? (1)
Loperamide
What is the usual screening test for Helicobacter pylori infection in the community? (1)
Stool antigen test
What medications are used to manage hepatic encephalopathy? (2)
1) Lactulose (aiming for 2-3 soft stools daily)
2) Abx, usually rifaximin
What scoring system is used to assess the severity of liver cirrhosis and the prognosis? (1)
Child Pugh score
What are the top genetic diseases that cause liver cirrhosis? (3)
Haemachromatosis
Wilson’s
A1AT deficiency
What is the inheritance pattern of alpha-1 antitrypsin deficiency? (1)
What gene is affected? (1)
Autosomal co-dominant
SERPINA1 gene coding for alpha-1 antitrypsin on chromosome 14
Which hepatitis B marker is used to screen for active infection? (1)
Surface antigen HBsAg
What specific enzyme is central to how alpha-1 antitrypsin deficiency affects the lungs? (1)
Neutrophil elastase
What investigation is used to assess the stiffness of the liver using high-frequency sound waves to determine the degree of fibrosis and cirrhosis? (1)
Transient elastography (“Fibroscan”)
What are the options for prophylaxis of bleeding in stable oesophageal varices? (2)
1) Propanolol
2) Variceal band ligation
What test for Helicobacter pylori can be performed during an endoscopy procedure? (1)
Rapid urease test (CLO test)
What treatment may be used to induce remission in Crohn’s disease where there are concerns about the side effects of drugs, particularly in children? (1)
Enteral feeding
What tool is used in alcohol withdrawal to score a patient on their symptoms and guide treatment? (1)
CIWA-Ar (Clinical Institute Withdrawal Assessment for Alcohol, revised) tool
What treatment for liver cancer involves injecting chemotherapy directly into the hepatic artery that feeds the tumour? (1)
Transarterial chemoembolisation (TACE)
What are the four most common causes of liver cirrhosis? (4)
1) Alcohol related liver disease
3) Non-alcoholic fatty liver (NAFLD)
3) Hep B
4) Hep C
Which type of viral hepatitis is a DNA virus, as opposed to the other types, which are RNA viruses? (1)
Hep B
What investigation is used to confirm the diagnosis of inflammatory bowel disease? (1)
Colonoscopy with multiple intestinal biopsies
What features indicate decompensated liver disease (as opposed to compensated)? (4)
1) Ascites
2) Bleeding oesophageal varices
3) Jaundice
4) Hepatic encephalopathy
What treatment causes vasoconstriction and slows bleeding in patients with bleeding oesophageal varices? (1)
What other medical treatment is routinely given with bleeding varices and why? (2)
Terlipressin
Prophylactic Abx: shown to reduce mortality
What is the first-line treatment for maintaining remission in ulcerative colitis? (1)
Topical +/- oral 5-ASAs e.g. mesalazine
What condition causes a drop in haemoglobin and a rise in bilirubin? (1)
Why does bilirubin rise in this situation? (1)
Haemolytic anaemia
Bilirubin released with RBCs rupture
What blood test is the first-line investigation for assessing fibrosis in non-alcoholic fatty liver disease? (1)
Enhanced liver fibrosis (ELF)
What key risk factors for peptic ulcers involve disruption of the mucus barrier? (2)
H. pylori infection
NSAIDs
What is the tumour marker for cholangiocarcinoma? (1)
Ca19-9
What liver enzyme is particularly raised in primary sclerosing cholangitis? (1)
ALP
What two skin signs may be seen on examination of a patient with primary biliary cholangitis, and what is the underlying cause of these changes? (2)
1) Xanthelasma (cholesterol deposists in skin) –> caused by high serum cholesterol
2) Jaundice –> caused by high serum bilirubin
Which two types of receptor does alcohol act on in the brain, and what effect does it have on those receptors? (2)
1) Stimulates GABA
2) Inhibits glutamate receptors (NMDA receptors)_
What time period after stopping drinking does delirium tremens start? (1)
24-72 hours
What effect does alcohol have on the mean corpuscular volume (MCV)? (1)
Raised
What scoring system is used after endoscopy to estimate the risk of rebleeding and mortality in upper GI bleeding? (1)
Rockall
Patients with which condition are screened every six months for liver cancer? (1)
What does screening involve? (2)
Liver cirrhosis
Liver US & alpha fetoprotein
What type of organism is Helicobacter pylori? (3)
Gram negative aerobic
What interventional radiology procedure may be used as secondary prevention of bleeding oesophageal varices? (1)
What is the other major indication for this procedure? (1)
Transjugular portosystemic shunt (TIPS)
Refractory ascites
What stool test is used to screen for inflammatory bowel disease? (1)
Faecal calprotectin
What blood test is considered in women (but not men) when excluding other causes of the symptoms of irritable bowel syndrome? (1)
What does this screen for? (1)
Ca125
Ovarian cancer
What surgical procedure may be used to treat ulcerative colitis definitively? (1)
Panproctocolectomy (removing the entire large bowel and rectum)
What is an alternative for maintaining remission in Crohn’s where 1st line options are not suitable?
Methotrexate
Is episcleritis more common in Crohn’s or UC?
Crohn’s
Is uveitis more common in Crohn’s or UC?
UC
Where is abdo pain typically prevalent in UC?
LLQ
1st line medications in IBS?
a) for constipation
b) for diarrhoea
c) for cramps
a) bulk forming laxatives e.g. ispaghula husk
b) loperamide
c) antispasmodics e.g. mebeverine, hyosine butylbromide